Program control/firewall question

NIS2011
VISTA Home Premium 32 bit

Out of curiosity, I looked at my NIS fire wall log yesterday when I got home. I noticed this outbound connection to the internet from my PC
An instance of C:/Program Files/Java/jre6/bin/javaw.exe
is preparing to access the internet
Now this happened when nobody was using the computer.
I scanned the jre6/bin folder and nothing malicious was found.
I know java checks for updates but I dont think it uses the javaw.exe file to do that
just wondering why this executed on its own?
want to make sure nothing malicious going on
Any help very much appreciated. Thanks